Name:	bmy_AmountOfOperatingExpenseAtOrBelowWhichCollaborationPartnerWillReimburseGivenPercentage
Namespace Prefix:	bmy_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The amount of operating expense over which the collaboration partner will contribute a given percentage of reimbursements per the collaboration agreement.

No definition available.

Name:	bmy_AmountOfOperatingExpenseOverWhichCollaborationPartnerWillReimburseGivenPercentage
Namespace Prefix:	bmy_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The amount of collaboration fees recognized in cost of products sold for the period.

No definition available.

Name:	bmy_CollaborationFees
Namespace Prefix:	bmy_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

This element represents the maximum reimbursement of operating expenses payable to a collaboration partner during the period.

No definition available.

Name:	bmy_MaximumReimbursementOfOperatingExpensePayableToCollaborationPartner
Namespace Prefix:	bmy_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The reduction of net sales in the period representing the allocation of an extension payment to periods expected to benefit from such costs, such as the extension period.

No definition available.

Name:	bmy_OtherAmortizationOfDeferredCosts
Namespace Prefix:	bmy_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

This element represents a payment made to a collaboration partner to assume full responsibility for providing and funding all sales efforts.

No definition available.

Name:	bmy_PaymentToCollaborationPartnerToAssumeFullResponsibilityOfSalesEfforts
Namespace Prefix:	bmy_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	instant

This element represents the payment made to extend the term of the commercialization and manufacturing agreement, which is included in other assets and amortized as a reduction of net sales through the extension period.

No definition available.

Name:	bmy_PaymentToExtendTermOfCommercializationAgreement
Namespace Prefix:	bmy_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

The percentage of annual net sales of certain products payable as a collaboration fee to third parties in alliances and collaborations.

No definition available.

Name:	bmy_PercentageOfNetSalesPayableToCollaborationPartner
Namespace Prefix:	bmy_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

The percentage of sales to be recognized pursuant to the collaboration agreement.

No definition available.

Name:	bmy_PercentageOfNetSalesRecognizedFromCollaboration
Namespace Prefix:	bmy_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

The percentage of operating expenses to be reimbursed by the collaboration partner pursuant to the collaboration agreement.

No definition available.

Name:	bmy_PercentageOfOperatingExpenseReimbursementsFromCollaboration
Namespace Prefix:	bmy_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

This element represents the percentage of sales recognized by the Company when it is the principal in the customer sale.

No definition available.

Name:	bmy_PercentageOfSalesRecognized
Namespace Prefix:	bmy_
Data Type:	num:percentItemType
Balance Type:	na
Period Type:	instant

The maximum amount of sales within a range for which a given percentage will be paid to the collaboration partner as a collaboration fee per the collaboration agreement.

No definition available.

Name:	bmy_RangeOfSalesAtWhichGivenPercentageWillBePaidToCollaborationPartnerMaximum
Namespace Prefix:	bmy_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The minimum amount of sales within a range for which a given percentage will be paid to the collaboration partner as a collaboration fee per the collaboration agreement.

No definition available.

Name:	bmy_RangeOfSalesAtWhichGivenPercentageWillBePaidToCollaborationPartnerMinimum
Namespace Prefix:	bmy_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The amount of operating expenses reimbursed by the collaboration partner pursuant to the terms of the agreement.

No definition available.

Name:	bmy_ReimbursementOfOperationalExpenseFromCollaborations
Namespace Prefix:	bmy_
Data Type:	xbrli:monetaryItemType
Balance Type:	credit
Period Type:	duration

The aggregate expense charged against earnings to allocate the cost of intangible assets (nonphysical assets not used in production) in a systematic and rational manner to the periods expected to benefit from such assets. As a noncash expense, this element is added back to net income when calculating cash provided by or used in operations using the indirect method.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 230

-SubTopic 10

-Section 45

-Paragraph 28

-Subparagraph (b)

-URI http://asc.fasb.org/extlink&oid=31042434&loc=d3e3602-108585

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 45

-Paragraph 2

-URI http://asc.fasb.org/extlink&oid=6388964&loc=d3e16225-109274

Reference 3: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 350

-SubTopic 30

-Section 50

-Paragraph 2

-Subparagraph (a)(2)

-URI http://asc.fasb.org/extlink&oid=26713463&loc=d3e16323-109275

Name:	us-gaap_AmortizationOfIntangibleAssets
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

- Details

Name:	us-gaap_CollaborativeArrangementsAndNoncollaborativeArrangementTransactionsLineItems
Namespace Prefix:	us-gaap_
Data Type:	xbrli:stringItemType
Balance Type:	na
Period Type:	duration

Aggregate carrying amount, as of the balance sheet date, of noncurrent assets not separately disclosed in the balance sheet. Noncurrent assets are expected to be realized or consumed after one year (or the normal operating cycle, if longer).

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 210

-SubTopic 10

-Section S99

-Paragraph 1

-Subparagraph (SX 210.5-02.17)

-URI http://asc.fasb.org/extlink&oid=6877327&loc=d3e13212-122682

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 02

-Paragraph 17

-Article 5

Name:	us-gaap_OtherAssetsNoncurrent
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	instant

Amount of expense related to royalty payments under a contractual arrangement such as payment for mineral and drilling rights and use of technology or intellectual property.

Name:	us-gaap_RoyaltyExpense
Namespace Prefix:	us-gaap_
Data Type:	xbrli:monetaryItemType
Balance Type:	debit
Period Type:	duration

Total revenue from sale of goods and services rendered during the reporting period, in the normal course of business, reduced by sales returns and allowances, and sales discounts.

Reference 1: http://www.xbrl.org/2003/role/presentationRef

-Publisher FASB

-Name Accounting Standards Codification

-Topic 225

-SubTopic 10

-Section S99

-Paragraph 2

-Subparagraph (SX 210.5-03.1)

-URI http://asc.fasb.org/extlink&oid=26872669&loc=d3e20235-122688

Reference 2: http://www.xbrl.org/2003/role/presentationRef

-Publisher SEC

-Name Regulation S-X (SX)

-Number 210

-Section 03

-Paragraph 1

-Article 5